Explanation:
let the smallest odd integer be x
followed be x+2, x+4, and x+6
(it is +2 as after every odd number, it will be an even number, so in order for it to be a odd number again, you must +2)
x+(x+2)+(x+4)+(x+6) = 128
4x+12 = 128
4x = 128-12
= 116
x = 29
x+2 = 29+2
= 31
x+4 = 29+4
= 33
x+6 = 29+6
= 35
the four numbers are, 29, 31, 33, and 35